Test pattern: open SC doc with a Pdef

[jildertviet]

(
Pdef(\joniskTestPattern,
    Pbind(\type, \triggerJonisk,
        \jonisk, Pseq(~j.jonisks.at(~j.patterns[0]), inf),
        \delta, 0.5
    )

).play;
)
Pdef(\joniskTestPattern).stop;